设全集U={1,2,3,4,5,6,7},集合A={1,3,5},集合B={3,...

2024-12-18 15:43:37
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回答1:

分析:由全集U={1,2,3,4,5,6,7},集合A={1,3,5},集合B={3,5},知∁UB={1,2,4,6,7},由此能导出A∪(∁UB)=U.
解答:解:∵全集U={1,2,3,4,5,6,7},
集合A={1,3,5},集合B={3,5},
∴∁UB={1,2,4,6,7},
∴A∪(∁UB)={1,2,3,4,5,6,7}=U,
故选C.
点评:本题考查集合的交、并、补集的混合运算,是基础题.解题时要认真审题,仔细解答,注意合理地进行等价转化.